LAUSR

Abstract Two 3D coordination polymers, {[Zn(μ 3 -pzdc)(μ-dpeten) 0.5 ]∙3H 2 O} n ( 1 ) and [Zn(μ 3 -pzdc)(μ-dpeten) 0.5 ] n ( 2 ) (H 2 pzdc = pyrazine-2,3-dicarboxylic acid and dpeten = 1,2-bis(4-pyridyl)ethylene) have been synthesized by hydrothermal methods and structurally characterized by elemental analysis, IR spectroscopy, single-crystal and powder X-ray diffraction. In complex 1 , each pzdc ligand bridges three Zn(II) ions through forming two-dimensional layers. The adjacent 2D layers are further connected by dpeten ligand to generate a novel 3D framework containing one-dimensional large porous channel. It displays a 5-connected bnn hexagonal topology with point symbol {4 6 .6 4 }. Although the complex 2 was obtained under the same reaction conditions together with complex 1 , it exhibits 3D→3D a 2-fold interpenetration network with 6-connected pcu α-Po primitive cubic topology with point symbol {4 12 .6 3 }. The adjacent three Zn(II) ions are linked by tridentate bridging pzdc ligands to form a 2D layer structure. The 2D layers are further bridged by dpeten ligand to form a 3D pillar-layered network. Moreover, thermal and photoluminescent properties of complexes 1 and 2 have also been studied.